Sienna Miller wore a baby-blue velvet dress to be her sister 's

For Savannah Miller’s wedding, maid-of-honor Sienna Miller wore an ice-blue ’90s slip. Vogue gets an exclusive first look at the dresses for the wedding.

Sienna Miller's cowgirl Glastonbury look proves Wild West dressing is here to stay

Utterly Romantic Courthouse Wedding Junebug Weddings

Sienna Miller looks effortlessly stylish in a pale blue cut-out midi dress

Sienna Miller nails off-duty nonchalance in New York

Pregnant Sienna Miller steals the show with her bold bump-baring look as she joins lingerie-clad Jodie Turner-Smith and sleek Rita Ora for fashion's big night out in London's West End at Vogue

Utterly Romantic Courthouse Wedding Junebug Weddings

Sienna Miller nails off-duty nonchalance in New York

Sienna Miller nails off-duty nonchalance in New York

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In pictures: Sienna Miller among galaxy of stars at Vogue World event as she bares baby bump in daring frock